Improvement in padlocks



arma sans f Remnant No. 97,812, daad Damm 14, 1869.

. IMPRQVEMENT IN PADLOCKS.

The Schedule referred to in these Letters Patent and making pvart of thesame To all 'whom ita-my conce/rn:

gan, haveinvented a new and improvedPadlook; and I do hereby'` declarethat the following is a full, clear, and 4exact description thereof,whieh will enable others skilledin the art to 'make and use thesame,reference being had to the accompanying drawings,'forming partj ot' thisspecification.

The object of this iinventionis to provide a simple, cheap, andetlicient constructionand arrangement of the locking and operating-partsof padloeks.

y The invention consists in ail improved and simple" compoundtumbler-bolt, and relative arrangement thereot with the bow andbow-spring, all as herein-V "and Figure 3 represents av transversesection, taken on the line a: x.

Similar letters ot' reference. indicate corresponding arts. y

,'lhe tumblers A are pivoted at B, and provided with extensions forengaging and looking the bow D; They `have also projections, E, curvedfrom the pivot B as a centre, and arranged, `relatively to a projectionlidrointhe pivoted` end of the bow, which is pressed against the saidprojections E by a spring, G, for throwing out the bow, so that whenunlocking, the

. said spring is prevented -from/acting ou lthe bow until theprojections are withdrawn from the lockingnotch in the swinging end ofthe said bow.

H represents eoncavities in the said tumblers, which Be it known that I,JOHN S; RANKIN, of Ann Arr bor, inthe county of Washtcnaw, and State ofMichimerge Vin the convex curvature of the projection E,

at I Y This point passes beyond the projection F, at the moment theprojections() escape from vthe notch in the bow, and this gives libertyto the projection F to be thrown ont by the spring G.

In locking, the projection F, acting on theconcavities in the tumblers,'retracts them, when the bow is pressed in, before the said projectionescapes the point I, which permits th`e bow to be passed in, and the tuinblerfsprings K to throw the tumblers forward, locking it. Y

L represents a key-hole guard-plate. `As manyl of these tumblers may heused as required,"and the part-s thereof against which-.the key l lworks may be in any irregular order, to make it diiiiy cult to fit akey, or other device, for picking the lock;

and the tumblers are so arranged, relatively to the arm Ii, and a stud,M, of the ease, or other stop, that theynrust all be brought fairly downagainst t-he said stud before the arm will be permitted to be thrown upg by the spring G, and this can only be done by a key exactly fitted.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- Aspring-actuated pivoted tumbler, A, having project-ion O, recess H,iandconvexity E, in combination with a pivoted bow D, having locking recessat one`

